“…Among the data-gathering techniques are word association (e.g., Preece, 1976a;Gunstone, 1980), tree (or linear graph) construction (e.g., Fillenbaum & Rapoport, 1971), free sort (e.g., Hambleton & Sheehan, 1977;Gorodetsky & Hoz, 1985), similarity rating (e.g., P.E. Johnson, 1967), ordered trees (Naveh-Benjamin, McKitchie, Lin, & Tucker, 1986), questionnaires, structured interviews and experimental tasks (Peterson, Fennema, Carpenter, & Loef, 1989), card sorting, and teaching assignments (e.g., Markham, Mintzes, & Jones, 1994;Stein, Baxter, & Leinhardt, 1990), and concept mapping (e.g., Champagne, Klopfer, DeSena, & Squires, 1981; Brumby, 1983;Morine-Dershimer, 1989;Fisher, 1990;Hoz, Tomer, & Tamir, 1990; Novak, 1990a,b; Ross & Munby, 1991). Mathematical scaling methods, which are generally nonmetric, are then applied to these proximity matrices or the other summated data (other than concept maps) to portray the patterns underlying these matrices in graphical, clustered, or spatial configurations.…”